Ivan,
In general, Facebook sends most user-to-user notifications in the App Center area. It's a change they made early this year, and we agree, it's quite annoying.
Can you explain more about how you were seeing it in the 'jewel' notification area of Facebook before? Specifically, what settings are filled out:
* Website with Facebook Login
* App on Facebook
* Page Tab
We'll gladly do more testing to determine what methods work for the jewel notification, as we know it's something that our users want to happen by default.
Thanks,
Alex